Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos engenheiros de som estavam presentes para a lei hakon '3er leek?
 ###Tabelas: CREATE TABLE oklahoma_counties_ranked_by_per_capita_income (oklahoma_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE track_listing (track_listing_id AUTO_INCREMENT PRIMARY KEY, No. INT, Title VARCHAR, Lyricist VARCHAR, Composer VARCHAR, Arrangement VARCHAR, Sound Engineer VARCHAR, Length VARCHAR) CREATE TABLE qwik_liner_las_vegas_350 (qwik_liner_las_vegas_350_id AUTO_INCREMENT PRIMARY KEY, Pos. INT, Car # INT, Driver VARCHAR, Make VARCHAR, Team VARCHAR) CREATE TABLE lpga_tour_15 (lpga_tour_15_id AUTO_INCREMENT PRIMARY KEY, No. INT, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, To par VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR, Winners share ( $ ) INT) CREATE TABLE internet_availability (internet_availability_id AUTO_INCREMENT PRIMARY KEY, Nation VARCHAR, Population (thousands) INT, Internet subscriptions (2000) (thousands of users) INT, Internet subscriptions (2008) (thousands of users) INT, % growth (2000–2008) INT, % Internet users INT)  
SELECT COUNT Sound Engineer FROM track_listing WHERE Title = Law Hakon '3er Leek